code name

柯林斯词典

1. N-COUNT A code name is a name used for someone or something in order to keep their identity secret. 化名[usu N n]
One of their informers was working under the code name Czerny. 他们的一名线人的化名为车尔尼。
2. V-T If a military or police operation is code-named something, it is given a name which only the people involved in it know. 代号为[usu passive]
The operation was code-named Moonlight Sonata. 这次行动的代号是“月光奏鸣曲”。
...a military contingent, code-named Sparrowhawk. ...代号为“雀鹰”的小分队。